JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2018
·Vol. 33
·期 1
·212-220
·
IF 0.524
Liu Qingting,Ni Na,Sun Quan,Wu Xiaoxue,Bao Xujin,Fan Zhang,Zhang Rong,Hu Shengfei,Zhao Feng,Li Xiao
Novel organic-inorganic composites were in-situ synthesized by using TriSilanolPhenyl polyhedral oligomeric silsesquioxane (SO-POSS) as fillers and poly(2,5-benzimidazole) (ABPBI) as polymer matrix. The uniformly dispersed 3% SO-POSS particles in ABPBI matrix increased the thermal stability of the composite membranes. It was found that both the water and H 3 PO 4 uptakes were increased significantly with the addition of SO-POSS due to the formation of hydrogen bonds between the POSS and H 2 O/H 3 PO 4 , which played a critical role in the improvement of the conductivity of the composite membranes at temperature over 100 °C. Proton conductivities of H 3 PO 4 doped with 3wt% SO-POSS contained ABPBI membranes increased with the increase of H 3 PO 4 absorbance, reaching the maximum proton conductivity of 2.55 × 10 -3 S·cm -1 at 160 °C, indicating that the ABPBI/SO-POSS composite membrane could be a promising candidate for mid-temperature PEMFCs.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Kun Hou,Yicheng Zeng,Cailong Zhou,Jiahui Chen,Xiufang Wen,Shouping Xu,Jiang Cheng,Pihui Pi
Robust polyhedral oligomeric silsesquioxane (POSS)-based superhydrophobic fabrics were successfully generated by surface modification of fibers with mercapto silanes followed by click coupling with methacryl-heptaisobutyl POSS (MAPOSS). MAPOSS grafted onto the fabric surfaces not only increased the surface roughness but also lowered the surface energy of fabric, resulting in superhydrophobicity with a water contact angle of 159° and a sliding angle of 7°. Importantly, the as-prepared superhydrophobic cotton fabric is tolerant to corrosive liquids, UV irradiation, high temperature environment , ultrasonic washing and mechanical abrasion. And the as-prepared superhydrophobic fabric could be used as an adsorbent material for removing oil from water. In addition, MAPOSS could be easily grafted onto other porous substrates (including but not limited to polyester fabrics, filter papers and melamine sponges) to endow these materials with high hydrophobicity . Therefore, this facile, environmentally friendly, low cost and versatile method offers great technological promise in the preparation of robust superhydrophobic coatings on a large scale.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2018
·
IF 4.514
Fang Wang,Yadong Wu,Yudong Huang
Hybrid organic/inorganic nanocomposites based on aramid nanofibers (ANFs) and different amounts of polyhedral oligomeric silsesquioxane (POSS) nanostructured chemicals were prepared via solution blending and vacuum-assisted flocculation, compared with traditional film fabrication methods, this process is time-saving by adopting ethanol as agglomerator. The mechanical properties of ANFPs membranes could be altered by changing the POSS content, in which the POSS served as a cross-linking agent between nanofibers, and ANFPs composite membrane presented the optimal tensile strength with 6 wt.% POSS NPs embedding in the nanocomposite. In addition to the satisfactory mechanical performance and vitreousness, the unique thermal assets of ANFs and POSS further enabled the membranes with high thermal stability. Based on these results, it could be concluded that the ANFPs membranes developed here might provide the alternative materials for the practical application of strong, transparent and heat-resistant membrane.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2016
·
IF 11.553
Dan Liu,Gang Cheng,Heng Zhao,Chao Zeng,Deyu Qu,Liang Xiao,Haolin Tang,Zhao Deng,Yu Li,Bao-Lian Su
Polyhedral oligosilsesquioxanes (POSS), regarded as the smallest possible particles of silica , are used as carbon source and assembled into hierarchically porous carbon structures by a block copolymer-assisted method. The obtained carbon materials with high specific surface area of over 2000 m 2 g −1 and large pore volume of over 1.19 cm 3 g −1 possess both quite uniform micropores with the size of ~1 nm and highly ordered mesopores with the size of ~4 nm, owing to the molecular-scale templating effect of POSS siloxane cages as well as the good assembly compatibility between the block copolymers and the aminophenyl-functionalized POSS used. The mesopore arrangement can be two-dimensionally hexagonal ( p 6 m ) or body-centered cubic ( Im 3 ¯ m ) by simply adjusting different block copolymers. Nitrogen functionalities with a relatively high content (~4 wt%) can spontaneously be incorporated into those carbon materials. Benifiting from the uniform microporosity and the nitrogen doping, the specific capacitance of the POSS-derived hierarchically porous carbons can reach ~160 F g −1 in ionic liquid electrolyte and ~210 F g −1 in 1 M H 2 SO 4 aqueous electrolyte, when measured at a current density of 0.25 A g −1 in a symmetrical two-electrode cell. More importantly, the highly ordered mesopores can facilitate ions fast transportion to the fine micropores to achieve the excellent power performance. The hierarchial carbon sample with a hexagonal mesostructure and a high mesoporosity displays the best rate capability with 94% and 97% of capacitance retention in ionic liquid and 1 M H 2 SO 4 , respectively, with the current density range from 0.25 to 10 A g −1 . By combining self-assembly strategy with rich POSS chemistry, we believe that many other hierarchical hybrid materials or carbon materials with unique electrochemical properties can be synthesized.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Hui Li,Sainan Miao,Wei Chen,Xixue Yang,Minhua Li,Tieling Xing,Yan Zhao,Guoqiang Chen
Fluorinated polyhedral oligomeric silsesquioxane (F-POSS) has been widely used for preparing liquid-repellent coatings. It is usually pre-synthesized and dispersed in expensive fluoro-solvent (or fluorosurfactant solution) for dip coating. Since the melting temperature of F-POSS is not high (122–140 °C), its loss during use is inevitable. However, reports on the grafting of F-POSS on substrate are rare. In this work, we report the fabrication of superhydrophobic and oleophobic cotton fabrics through the silane coupling of (heptadecafluoro-1,1,2,2-tetradecyl) trimethoxysilane (FAS) and 3-mercaptopropyltriethoxysilane (MPTES) on cotton fiber and the subsequent UV-induced thiol-ene click reaction between octavinyloctasilasesquioxane (OVPOSS) and MPTES thiols (and 1H, 1H, 2H, 2H-perfluorododecyl-1-thiol, PFDT). The as-prepared FAS/SH-F-POSS cotton fabric showed superhydrophobicity and high oleophobicity, as well as good durability and self-healing ability. It can withstand at least 15 accelerated washing cycles, 2000 abrasion cycles over sandpaper, 10 cycles of O 2 plasma etching , acid/alkaline/salt solution corrosion, and 25 cycles of UV aging/moist erosion. Such a durable superhydrophobic and oleophobic cotton fabric is useful for functional clothing and textile products in various fields.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2017
·
IF 3.684
Zhongying Wu,Yiyao Tang,Dewen Sun,Shujiang Zhang,Yixuan Xu,Hua Wei,Chenliang Gong
Organic-inorganic hybrid polymers based on poly(arylene ether sulfone) (PAES) containing multi-sulfonated polyhedral oligosilsesquioxane (POSS) pendants (PAES-sPOSS-x) were synthesized to improve the inorganic fillers' distribution in polymer matrix and to enhance the ion conductivity and swelling resistance of aromatic polymer electrolyte membrane. The synthesis of the graft hybrid polymers in this study involves the grafting of mono-functional 3-Iodopropylheptaphenyl POSS with an -OH functionalized polymer main-chain and postsulfonation of the POSS grafted PAES. Notably, nearly all of the benzene rings on the POSS side chains were sulfonated successfully without any sulfonation of main chains. The structure with hydrophobic aromatic backbone and hydrophilic hybrid side chains made an improvement of the nano-phase hydrophilic/hydrophobic separation, thereby facilitating the formation of continuous proton exchange channels. The transmission electron microscopy (TEM) images of the comb-shaped polymer membranes showed homogeneous sulfonated POSS (sPOSS) dispersion, significant phase separation and well-defined interconnected hydrophilic networks. This morphological structure leaded to dramatically enhanced comprehensive properties as proton conductive membranes.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER SCIENCE SERIES B
·
2023
·Vol. 65
·期 2
·230-237
·
IF 1.2
Yang Wu,Xu Yushan,Yu Juan,Huang Pei
Abstract A substrate is one critical factor for the wide application of flexible displays and electronic packaging materials in the future. Polyimides with high optical transparency, good thermal stability, dielectric properties, and nice mechanical properties are significant in substrates. A simple and feasible method to modify transparent polyimide films is to blend them with inorganic fillers. In this work, we successfully modified the transparent films by using phenyltriethoxysilane to synthesize trisilanol phenyl polyhedral silsesquioxane and adding it to the films. The introduction of trisilanol phenyl polyhedral silsesquioxane into the copolymer films resulted in the increase of high-temperature dimensional stability, optical performance, and mechanical properties of the films. The sample containing 5% of trisilanol phenyl polyhedral silsesquioxane exhibited a glass transition temperature of 322°C, coefficient of thermal expansion of 41.4 ppm/K, and tensile strength of 127 MPa, and the transmittance at 450 nm has reached 83.5%.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2024
·
IF 4.5
Ting Pan,Hao Wu,Zhiqiang Guan,Xiaofei Zhu,Yingqian Hu,Linxuan Fang,Yongbing Pei,Lianbin Wu
Octaglycidyldimethylsilyl polyhydric silsesquioxane (OG-POSS) in coordination with tetraethyl orthosilicate, tetrapropyl orthosilicate and tetrabutyl orthosilicate mixed solution was applied to the bonding of metal substrate and silicone resin thermal protective coating. The influence of OG-POSS addition on the interface of primer was systematically investigated by means of scanning electron microscope (SEM), salt spray test, thermogravimetric infrared spectroscopy (TGA-IR) and back temperature test. Results showed that the addition of OG-POSS favored the formation of a silane film of the primer, resulting in a more compact and continuous film. At the same time, the silane film had excellent corrosion resistance and adhesion, with a maximum adhesion strength of about 1.42 MPa. In addition, OG-POSS provided a unique Si-O-Si cage structure in the primer, which improved the ablation resistance of the interface layer, preventing the degradation and peeling of the coating in harsh environments.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2014
·Vol. 50
·期 5
·2158-2166
·
IF 2.305
Ma Yanli,He Ling,Pan Aizhao,Zhao Chengben
The novel latex of P(GMA-POSS)- co -PMMA is synthesized for coatings by glycidyl methacrylate polyhedral oligomeric silsesquioxane (GMA-POSS) and methyl methacrylate (MMA). First, GMA-POSS is prepared by the epoxide opening reaction of glycidyl methacrylate (GMA) and aminopropyllsobutyl POSS (NH 2 -POSS). Then, the as-obtained GMA-POSS monomer is directly used for emulsion polymerization with MMA to obtain P(GMA-POSS)- co -PMMA latex. The chemical structure of P(GMA-POSS)- co -PMMA latex is characterized. The core–shell morphology of latex is proved to distribute uniform spherical particles as 20–60 nm in diameter. The effect of POSS content on the properties of film casting from P(GMA-POSS)- co -PMMA latex is studied for surface roughness, static contact angle, thermostability, and universal mechanical testing. The introducing of POSS into latex leads to an increase of P(GMA-POSS)- co -PMMA in the hydrophobicity, adhesive strength, thermal and mechanical proprieties. When GMA-POSS amount is controlled at 33 wt%, the glass transition temperature ( T
g ) and static contact angle are increased into 130 °C and 102º, respectively, and the adhesion to the substrate is raised to 477.2 MPa. Therefore, P(GMA-POSS)- co -PMMA is promising to be suggested as coating material.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 73
·46139-46147
·
IF 3.108
Cheng Liu,Ting Chen,Conghui Yuan,Ying Chang,Guorong Chen,Birong Zeng,Yiting Xu,Weiang Luo,Lizong Dai
The development of a multi-element synergistic flame-retardant depends largely on the design and synthesis of flame-retardants comprising a mixture of elements such as P, N and Si. Herein, we prepare a novel POSS derivative named octa-(N,N-(bis-(9,10-dihydro-9-oxa-10-phosphaphenanthene-10-yl)methyl)aminopropyl) silsesquioxane (ODMAS) that features a high content of P. The chemical structure of ODMAS was confirmed by FT-IR, 1H NMR, 29Si NMR, 31P NMR and elemental analysis. Because of the excellent compatibility between ODMAS and epoxy resin, the as-prepared ODMAS/EP composites are highly transparent as well as possessing improved flame-retardancy and mechanical properties. The results show that the LOI value reaches 37.1% with a low phosphorus content (1.6 wt%), samples only 5 wt% loading are classified with the V0 rating in the UL-94 test, and the char yield significantly increased and the maximum weight loss rate decreased with increased ODMAS loading. Results of a three-point bending test show that the flexural modulus of ODMAS/EP is higher than that of the pure epoxy resin. All results indicate that this novel flame retardant not only has good solubility in the polymer matrix, but can also simultaneously improve the flame resistance and mechanical properties of the polymeric material.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
BIOMACROMOLECULES
·
2023
·
IF 6.2
Lan Wang,Zhen Du,Mengmeng Xu,Qiuju Dai,Qing-Yun Guo,Baoer Fan,Wen Tang
Polymeric vehicles often exhibit batch-to-batch variations due to polydispersity, limiting their reproducibility for biomedical applications. In contrast, polyhedral oligomeric silsesquioxane (POSS) has emerged as an attractive candidate for drug delivery due to its precise chemical structure and rigid molecular shape. A promising strategy to enhance drug efficacy while reducing systemic toxicity is the development of multi-stimuli-responsive delivery systems capable of targeted drug release at a disease site. Herein, we developed a drug delivery platform based on POSS–polymer conjugates. By functionalizing the POSS with amino groups and establishing B–N coordination with boronic acids, the nanoparticles (NPs) exhibit responsive behavior to stimuli, including adenosine-5′-triphosphate (ATP), acidic pH, and nucleophilic reagents. We successfully encapsulated two boronic acid-containing molecules: tetraphenylethylene (TPE), serving as a fluorescent probe, and bortezomib (BTZ), an anticancer drug. The TPE@NPs were employed to visualize the cellular uptake of NPs by tumor cells, while the BTZ@NPs exhibited increased cytotoxicity in tumor cells compared with normal cells. This POSS–PEG conjugate offers a nanoparticle platform for encapsulating versatile boronic acid-containing molecules, thereby enhancing drug efficacy while minimizing systemic toxicity. Given the wide-ranging applications of boronic acid-containing molecules in biomedicine, our platform holds significant promise for the development of intelligent drug delivery systems for diagnostics and therapeutics.
研究领域:
药剂学
·
生物医学工程
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
HIGH PERFORMANCE POLYMERS
·
2018
·
IF 1.047
Jingting Wang,Yanfeng Wei,Xuesong Li,Jianxin Mu
A series of novel poly(aryl ether sulfone)s (PESs) with polyhedral oligomeric silsesquioxane (POSS) and biphenyl group in the main chain were synthesized from 4,4′-biphenol, biphenol POSS and 4,4′-bis[(4-chlorophenyl)sulfonyl]-1,1′-biphenyl via a nucleophilic aromatic substitution polycondensation. The structures of the polymers were characterized by infrared, nuclear magnetic resonance, and wide-angle X-ray diffraction spectroscopy. The incorporation of POSS and biphenyl group into PES matrix at various molar percentages of POSS resulted in a dramatic decrease of dielectric constant as well as a significant increase of hydrophobicity. As the content of POSS increased, the dielectric constant decreased from 2.54 to 1.82, while the contact angle can be increased to 122.6°. The thermal properties, crystallinity, solvent resistance, and surface topography were also studied in this article.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）